This post explains for the 8-bit MCU.
The Part Number is STM8S003F3.
The function of this semiconductor is 16MHz STM8S 8-bit MCU.
Manufacturer: STMicroelectronics
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Description
This is Value line, 16 MHz STM8S 8-bit MCU, 8 Kbyte Flash, 128 byte data EEPROM.
The STM8S003F3 value line 8-bit microcontrollers offer 8 Kbytes of Flash program
memory, plus integrated true data EEPROM.
An 8-bit microcontroller unit (MCU), often referred to simply as an “8-bit MCU,” is a type of microcontroller that uses an 8-bit data bus. These microcontrollers are characterized by their relatively simple architecture and limited computational capabilities compared to higher-bit counterparts like 16-bit, 32-bit, or 64-bit MCUs. Despite their limitations, 8-bit MCUs are still widely used in a variety of embedded systems due to their cost-effectiveness and suitability for many control and sensor interfacing tasks.
Features
1. Core
• 16 MHz advanced STM8 core with Harvard architecture and 3-stage pipeline
• Extended instruction set
2. Memories
• Program memory: 8 Kbyte Flash memory; data retention 20 years at 55 °C after 100 cycles
• RAM: 1 Kbyte
• Data memory: 128 bytes true data EEPROM; endurance up to 100 k write/erase cycles
3. Clock, reset and supply management
• 2.95 V to 5.5 V operating voltage
• Flexible clock control, 4 master clock sources
(1) Low-power crystal resonator oscillator
(2) External clock input – Internal, user-trimmable 16 MHz RC
(3) Internal low-power 128 kHz RC
Block Diagram